General

  • Target

    BofA_Remittance_Advice.xls

  • Size

    122KB

  • Sample

    220816-w2x2bacdem

  • MD5

    4b46967dd9b0cc889a71879e74c78163

  • SHA1

    f4ab4a4754ba6815e6ba8adb03f68d9ea2edd39a

  • SHA256

    d1300974e16f75b2fd0deeb5b4f212f2d1c9eb0d77bc51664c4dfbcdca4beb63

  • SHA512

    b7bd17bc20af7daf04f201e2d4fc2a73ad3e9e1c7c97d9451ca4e0a62d777ae469b356d5b8191e50020411f51a4b1c42fade07c6ed6196af0355298b6c2aef81

  • SSDEEP

    3072:6k3hOdsylKlgxopeiBNhZFGzE+cL2kdAFz5RkTdjPIUXQO2XIlGdDSojrsm+:6k3hOdsylKlgxopeiBNhZF+E+W2kdA91

Malware Config

Extracted

Family

remcos

Botnet

Aug

C2

topboysully.dvrlists.com:10171

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Aug-MR3KZU

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      BofA_Remittance_Advice.xls

    • Size

      122KB

    • MD5

      4b46967dd9b0cc889a71879e74c78163

    • SHA1

      f4ab4a4754ba6815e6ba8adb03f68d9ea2edd39a

    • SHA256

      d1300974e16f75b2fd0deeb5b4f212f2d1c9eb0d77bc51664c4dfbcdca4beb63

    • SHA512

      b7bd17bc20af7daf04f201e2d4fc2a73ad3e9e1c7c97d9451ca4e0a62d777ae469b356d5b8191e50020411f51a4b1c42fade07c6ed6196af0355298b6c2aef81

    • SSDEEP

      3072:6k3hOdsylKlgxopeiBNhZFGzE+cL2kdAFz5RkTdjPIUXQO2XIlGdDSojrsm+:6k3hOdsylKlgxopeiBNhZF+E+W2kdA91

    Score
    10/10
    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • Blocklisted process makes network request

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Tasks